Selena Gomez accused of lip syncing at the 2017 AMAs

The 25-year-old pop star performed her latest hit, a collaboration with Marshmello called "Wolves," at the AMAs on Sunday night, and Twitter users were quick to suggest that the singer was lip syncing during her first televised performance of 2017.

Clad in a slinky white slip dress, sneakers and her newly-dyed blonde hair, Gomez appeared confident back in the spotlight for the first time since receiving a kidney transplant over the summer. She had fake blood slathered on her body as she delivered a subdued performance of her latest single.

Not everyone was impressed, though.

"Worst lip sync performance goes to Selena Gomez," one used tweeted.

"Hey Selena Gomez, if you’re going to lip sync, you should probably make it semi believable," someone else wrote.

See reactions to Selena Gomez's 2017 AMAs performance:

Gomez has unsurprisingly not responded to the criticism, though she did take to Instagram Stories after she left the award show early to thank her fans for support. After all, not everyone on Twitter believed she was miming during her performance of "Wolves."

"May I remind y’all Selena is still recovering from a kidney transplant and she just gave the performance of a lifetime," someone wrote.

Her "Wolves" performance represented her official launch back into the spotlight, but the singer has still been making headlines over the last couple of weeks for developments in her personal life. After Gomez and boyfriend of 10 months The Weeknd broke up earlier this month, she has been photographed multiple times a week with ex-boyfriend Justin Bieber.

Photos of the pair making out last week seemed to confirm that they're indeed back together.